[motornut]

are the hoses getting warm to the core?
is the fan blowing air out?
some people change the thermostats,
just try covering the grill
i cover mine once the temps get close to freezing till spring
but if you see it overheat, you call pull it off
the cold air threw the rad removes more heat then your makin
the shroud could be worse concetrating the flow more
but it cools better in the summer